Fans of the Marvel universe probably know that two more Avengers movies are in the works, and from the sounds of it, they’ll be of epic proportions. Sure, our favorite superheroes will clash in this year’s Captain America: Civil War, but that doesn’t mean they’re not ready to reunite for the greater good of the planet. Imagined as a two-part series, the third Avengers movie is called Avengers: Infinity War and the first details about it have already been shared with the world.

Set to hit cinemas on May 4th, 2018 (Avengers: Infinity War Part 1), and on May 3rd, 2019, (Avengers: Infinity War Part 2), the new movies will be jam-packed with familiar heroes, as directors Joe and Anthony Russo suggested in an interview with ComicBook.

Asked whether the Guardians of the Galaxy heroes will appear in Infinity War, they were not eager to actually confirm it, but they did imply that Earth’s superheroes will have to join forces to defeat an ultimate rival: The demigod Thanos, who will be voiced by Josh Brolin.

“That [the appearance of Guardians] is another one that we would have to reserve as a surprise,” Joe Russo said. “But we will say this: People will not be disappointed in the amount of characters in the movie. The concept of Infinity War is that the Marvel universe unites to battle the greatest threat to the world and universe that you’ve ever seen, and we’re going to honor that concept.”

Russo also revealed in the interview that psychological realism will be of primary focus in the new films.

“I sat in the theater and watched Empire Strikes Back seven times in a row when I was a kid,” the director said. “Yeah, we’re science fiction fans as well, Dungeons and Dragons. We collected all the books when we were kids. We had figurines. Anything that you could think of that has to do with fantasy or sci-fi or superheroes was in our universe. We’re just going to approach the cosmic side with the same fervor that we did the earthbound work we’ve been doing.”

“We also are going to work really hard to bring a psychological realism. We obviously can’t bring a naturalism to it because it doesn’t really exist outside of science fiction, but we can bring that psychological realism to it, to the characters, and that’s going to be our focus,” Russo said.

“Also, it’s going to be our focus to explore the cosmic side, applying the same rules that we like to apply to the last two films that we’ve done,” Russo concluded. “It ends up being the rules of physics always apply or apply as much as we can get them to apply based on what we’re doing.”